Jeffrey Alan Samardzija (; born January 23, 1985), nicknamed Shark, is an American professional baseball pitcher for the San Francisco Giants of Major League Baseball (MLB). He played college baseball and football for the University of Notre Dame, and was recognized as a two-time All-American wide receiver. Previously, he played in MLB for the Chicago Cubs from 2008 to 2014, the Oakland Athletics in 2014, and the Chicago White Sox in 2015. He was an MLB All-Star in 2014.
He is also known as Jeffrey Alan Samardzija.